cellselectionrenderer.cpp

/***************************************************************************
 *   Copyright (C) 2005-2008 by the FIFE team                              *
 *   http://www.fifengine.de                                               *
 *   This file is part of FIFE.                                            *
 *                                                                         *
 *   FIFE is free software; you can redistribute it and/or                 *
 *   modify it under the terms of the GNU Lesser General Public            *
 *   License as published by the Free Software Foundation; either          *
 *   version 2.1 of the License, or (at your option) any later version.    *
 *                                                                         *
 *   This library is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU     *
 *   Lesser General Public License for more details.                       *
 *                                                                         *
 *   You should have received a copy of the GNU Lesser General Public      *
 *   License along with this library; if not, write to the                 *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA          *
 ***************************************************************************/

// Standard C++ library includes

// 3rd party library includes

// FIFE includes
// These includes are split up in two parts, separated by one empty line
// First block: files included from the FIFE root src directory
// Second block: files included from the same folder
#include "video/renderbackend.h"
#include "util/math/fife_math.h"
#include "util/log/logger.h"
#include "model/metamodel/grids/cellgrid.h"
#include "model/structures/instance.h"
#include "model/structures/layer.h"
#include "model/structures/location.h"

#include "view/camera.h"
#include "cellselectionrenderer.h"


namespace FIFE {
    static Logger _log(LM_VIEWVIEW);

    CellSelectionRenderer::CellSelectionRenderer(RenderBackend* renderbackend, int32_t position):
        RendererBase(renderbackend, position) {
        setEnabled(false);
        m_color.r = 255;
        m_color.g = 0;
        m_color.b = 0;
    }

    CellSelectionRenderer::CellSelectionRenderer(const CellSelectionRenderer& old):
        RendererBase(old),
        m_color(old.m_color) {
        setEnabled(false);
    }

    RendererBase* CellSelectionRenderer::clone() {
        return new CellSelectionRenderer(*this);
    }

    CellSelectionRenderer::~CellSelectionRenderer() {
    }

    CellSelectionRenderer* CellSelectionRenderer::getInstance(IRendererContainer* cnt) {
        return dynamic_cast<CellSelectionRenderer*>(cnt->getRenderer("CellSelectionRenderer"));
    }
    
    void CellSelectionRenderer::reset() {
        m_locations.clear();
    }

    void CellSelectionRenderer::selectLocation(const Location* loc) {
        if (loc) {
            std::vector<Location>::const_iterator it = m_locations.begin();
            for (; it != m_locations.end(); it++) {
                if (*it == *loc) return;
            }

            m_locations.push_back(Location(*loc));
        }
    }

    void CellSelectionRenderer::deselectLocation(const Location* loc) {
        if (loc) {
            std::vector<Location>::iterator it = m_locations.begin();
            for (; it != m_locations.end(); it++) {
                if (*it == *loc) {
                    m_locations.erase(it);
                    break;
                }
            }
        }
    }

    void CellSelectionRenderer::render(Camera* cam, Layer* layer, RenderList& instances) {
        if (m_locations.empty()) {
            return;
        }

        std::vector<Location>::const_iterator locit = m_locations.begin();
        for (; locit != m_locations.end(); locit++) {
            const Location loc = *locit;
            if (layer != loc.getLayer()) {
                continue;
            }
            
            CellGrid* cg = layer->getCellGrid();
            if (!cg) {
                FL_WARN(_log, "No cellgrid assigned to layer, cannot draw selection");
                continue;
            }

            std::vector<ExactModelCoordinate> vertices;
            cg->getVertices(vertices, loc.getLayerCoordinates());
            std::vector<ExactModelCoordinate>::const_iterator it = vertices.begin();
            ScreenPoint firstpt = cam->toScreenCoordinates(cg->toMapCoordinates(*it));
            Point pt1(firstpt.x, firstpt.y);
            Point pt2;
            ++it;
            for (; it != vertices.end(); it++) {
                ScreenPoint pts = cam->toScreenCoordinates(cg->toMapCoordinates(*it));
                pt2.x = pts.x; pt2.y = pts.y;
                Point cpt1 = pt1;
                Point cpt2 = pt2;
                m_renderbackend->drawLine(cpt1, cpt2, m_color.r, m_color.g, m_color.b);
                pt1 = pt2;
            }
            m_renderbackend->drawLine(pt2, Point(firstpt.x, firstpt.y), m_color.r, m_color.g, m_color.b);
        }
    }

    void CellSelectionRenderer::setColor(uint8_t r, uint8_t g, uint8_t b) {
        m_color.r = r;
        m_color.g = g;
        m_color.b = b;
    }
}